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SMTP traffic does not pass through the IPSec VPN tunnel when a 2811 router with Cisco IOS Software version 12.4 is used as the tunnel end point

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Core issue

This problem occurs when the ip inspect name esmtp command is issued.

Resolution

For a workaround, disable the ip inspect name command for the traffic that needs to pass through the VPN tunnel, as shown in this example:

(config)#no ip inspect name esmtp

For more information, refer to SMTP and ESMTP Connections Inspection with Cisco IOS Firewall Configuration example for more information.

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